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(Nd Model.) 2 Sheets-Shget vG.. P. BLISS.

FURNACE GRATB. v

No. 504,195. Patented Aug. 29, 1893.

FCL.

4 x i XXNNK Unitime STATES PATENT OFFICE.

COLLINS P. BLISS, OF NEW YORK, N. Y. y

FU RNACE-GRATE.

SPECIFICATION forming part of Letters Patent No. 504,195, dated August 29, 1893. Application filed May 12, 1893. Serial No. 478,920. (No model.)

T all whom t may concern: y

Be it known that l, COLLINS P. BLISS, a citizen of the United States, and a resident of' 4 bustion chamber, the object of my invention being to so construct sucha grate as to provide for the agitation of the mass of fuel, to insure the downward feed of the same as the ashes and clinkers are discharged, to break up any clinkers formed on the face of the bars, and to provide for the ready drawing of the iire in caselof exigency. This object I attain in the manner hereinafter set forth reference being had to the accompanying drawings, in which- Figure 1,is a longitudinal section of a furnace constructed in accordance with my invention. Figs. 2 and 3, are similar views showing the grate in different positions; and Fig. 4, is a View of a rocking bar forming part of the structure.

A represents the rear wall of the furnace, and B a hollow transverse slab constituting the top of the re place, an outlet flue D being formed between the slab and the rear wall and an inclined feed hopper or chute D being formed in frontof said slab by means of an inclined slab or plate D2. The inclined grate bars F are hung at the upper ends upon a bar G mounted in the frame of the furnace, as hereinafter described, and the lower ends of the grate bars are supported upon a rocking bar H extending transversely across the furnace, each bar of the grate having on the under side a lug a resting upon the rocking bar H and upon a lug b and b projecting therefrom, every other bar resting upon the lugs b which project from the bar H in one direction, while the alternate bars rest upon the lugsb which alternate with the lugs b and project from the rocking bar H in the opposite direction. The rocking bar H is mounted upon a transverse shaft I below the same, said shaft being adapted to suitable 4 bearings on the side frames or walls of the furnace, and said bai- H has one or more arms d each connected by a rod d to a suitable lever, such as d2 either within or just outside of the furnace, a detachable handle or other suitable means being employed for operating the lever so as to eect the swinging of the bar H. When said bar is swung in one direction, therefore, one-half of the grate bars will be lifted at theirlower ends, and the other half will be lowered, and on swinging the bar H in the opposite direction the bars which were formerly lowered will be raised,

,and those which were lifted will be lowered.

Besides this independent or oscillating movement of the alternate bars of the grate there is, on each swinging of the bar H, also a slight lowering of the entire grate structure, owing to the fact that the bar H is at its highest- When in the mid or inactive position, and swings downward from such mid-position so that besides the agitation of the fuel due to the reciprocation of the grate bars there 1s a loosening up of the mass of fuel due to the slight drop of the grate which increases the distance between. the same and the transverse slab B at the top of the fire box so that the mass of fuel will slide downward upon the grate and the choking or arching of the fuel in the contracted tire box will be prevented.

At the bottom of the inclined grate F is a supporting grate M pivoted adjacent to the rear wall of the furnace and connected at the front end, by means of a rod f, to the arm d of the rocker bar H. As the latter is rocked in one direction, therefore, the front end .of the grate M will be lifted and the outlet for ashes and clinkers will be contracted as compared with the size of the outlet when the grates F and M are in their normal positions, but on rocking the bar H in the opposite direction the front end of the grate M will be lowered and the outlet for ashes and clinkers will be enlarged so as to insure the discharge of the same into the ash pit. The bar G which supports the upper end of the grate rests 1n L-shaped sockets m on the side frames or walls of the furnace and isiheld in place thereon by any suitable form of detachable retainer, that shown in the present instance being across bar n mounted in lugs on the front plate of the furnace and carrying one or more binding screws p bearing against the bar G. VThe opposite ends of the bar G are intended to fit into vertical grooves in the side frames or walls of the furnace so that on removing the retainer plate n the bar G can be drawn forward until it is clear of the sockets 'm and can then be lowered to a given distance so as to drop the front end of the grate as shown for instance by dotted lines in Fig. l, this operation being resorted to when it is desired to draw the fire or elfect a quick clearingout of the contents of the lire boX. The tops of the lugs b b of the rocker bar H are preferably grooved for the reception of the lower edges of the grate bars F so as to retain thesame in proper lateral position, or if desired, the grate bars may be grooved for the reception of ribs on thelugs.

Having thus described my invention, I claim l and desire to secure by Letters Patent- 1. The combination of the fire box and feeder, with the inclined grate composed of ai `series of bars supported at their lower ends upon a swinging bar mounted upon a Vrock shaft'belowthe same,`and` having alternating projectinglugs upon opposite sides, the faces of these lugs being eccentric in respect to the axis-of the rock shaft, and thoseupon one side of thebar supporting every other bar of the grate, and those upon the opposite side supporting the `alternate bars, substantially as specified. v

2. The combination of the fire box and feeder, with the inclined grate composed of a series of bars, a pivoted fuel supporting grate at the base of said inclined grate, a rocking bar `upon which the lower ends of the inclined grate bars are supported, and a connection between said rocking bar and the pivoted fuel supporting grate whereby the latter is caused to swing as the bars of the inclined grate are vibrated, substantially as specilied.

3. The combination of the [ire box and feeder, the inclined grate, a rocking support for the lower ends of the grate bars, a supporting bar for `theupper'end of the grate, side frames or walls having socketsfor said supporting bar `and grooves in which the ends of the bar are guided and inwhich they can be lowered on the removal of the bar from the sockets, and detachable retainingdevices for confining the bar in the sockets,v substantially as specified.

In testimony whereof I `have Vsigned my name to this specification in the presencexof two subscribing Witnesses.

COLLINS P. BLISS.

Witnesses:

THERON G. STRONG, JOHN DAVIS. 

